<!DOCTYPE html>
<html>
<head>

    <meta charset="utf-8" />
    <title>hao</title>
</head>
<body>
<!--view层：模板-->
<div id="app">
    { {message} }
</div>
<!--导入vue.js-->
<script src="https://cdn.jsdelivr.net/npm/vue@2.5.21/dist/vue.min.js"></script>
<script>
    var vm = new Vue({
        el: '#app',
        // model层：数据
        data: {
            message: "hello world!!!"
        }
    })
</script>
</body>

</html>